Tool for making armatures



May 10, 1932. v. 6. APPLE TOOL FOR MAKING ARM KTURES Original Filed May 16, 1929 2 Sheets-Sheet l INVENTOR May 10, 1932. v, GAPPLE 1,857,176

TOOL FOR MAKING ARXATURES Original Filed May 16, 1929 2 Sheets-$heet 2 IN VENTOR Patented May 10, 1932 TfoFFicE vINoEN'r e. n'rrnn, OF'DAYTON. onIo moon non MAKING anmnrunns Original application filedjMay 16, 1929;Serial No. 863,702." Divided and this application filed August 15,

1930. serial No. 475,483.

This invention is a division of my copending application, Serial 0. 363,? 02 filed May 16th, 1929, and relatesto atool formaking armatures of the class comprising a slotted 'core, a wlndlng of insulation covered wire and a commutator.

An object of the invention is to facilitate the assembly'of an armature of this type.

A more specific object is to provide a tool for making a structure wherein the core the turns of the wire composing the winding and the bars composing the commutator are all imbedded in the same substantially continuous mass of impervious insulating-ma-l terial whereby they are permanently held in spaced relation and protected against the harmful effect which results when oil, moisture, or other foreign matter is permitted'to enter into the spaces between the conductive portions of the structure as they are in come mon practice.

Other objects and meritorious features of the invention will become apparent to one skilled in the art as the invention is described in detail and reference is made to the drawings wherein,

Fig. 1 shows the core of the armature which I have selected to illustrate my invention. Fig. 2 shows the core Fig. 1 with the slots -lined with sheet insulation preparatory to placing the winding thereon and with collars at the ends of the core to keep the winding spaced apart from the shaft as it is being placed.

3 Fig. 3 shows the winding in place with extending leads formed of the ends of the wire composing the coils.

Fig. 4 shows a bar of stock from which the commutator segments are made.

Fig. 5 shows a single commutator segment.

Fig. 6 shows the wound structure Fig. 3 with a segment Fig. 5 electrically joined to each lead.

Fig. 7 is a vertical axial section througha tool used to arrange the segments of the structure Fig. 6 in proper spaced relation.

Fig. 8 shows the tool Fig. 7 in perspective. Fig. 9 is a ring for holding the segments to the tool Fig 6.

-.Fig. 10 shows thetools Figs and 9, as-

sembled 'on'the armature to locate the commutator segments. I L-Similar numerals refer .to similar parts throughout the several views. p

1111 the drawings a shaft 16 having a longitudinally extending keyway17 carries a core 18. composed of a plurality of'core laminae 19. Laminae19. have a series of winding slots 2Q separated byv teeth 21, and integral keys 22 extend inwardlyinto keyway 17 whereby slots 20 are held indefinite relation to: key way17. f

Slots 20 are lined as in Fig.2 by placing a single strip of insulation 23 around the core and looping it downward intoe'ach slot as at 24. Collars. 26' and27 ,areplaced'over the shaft 10, but remain there :only while the winding is being-put on thecore.

, Fig.3 shows the core 18 with the coils 28 wound in place; But before winding the wire into coils it is preferably treated by saturating the covering of the wire with liquidinsulation, to, insure that the pressure in cident to .the subsequent molding operation will notbreak downthe insulation between adjacent turns. Leads 29 are formedby joining the end of one. coil to the beginning of the next as in. common practice.

In Fig. 5 I showv one of the segments'30 which I use to compose a commutator. To make these segmentsrl provide wire. of trapeziform cross section (see Fig.4) and cut it into lengths by cutting through the wire at an angle as at 25. Thus for each out there is produced,a segment 30 having one end beveledas at 31 and the other end as at 32. Alead slot 33 is then'easilycut through the corner of eachsegment as shown- Fig. 6 shows thestruc'tu're after a segment 30 has beenjoined .to each of the leads 29. The leads are pressed into the leadslots 33.

whereupon they may be are welded; brazed,

soldered or otherwisev electrically joined to I the finished commutator and molding insulation within, between and about them while 7 so held, hardening the insulation, then retherefrom. A plug 42, bored at 43 is fitted into opening 36 and secured by pin '44. An :other pin 45 extends inwardly into opening;

moving the holding means, and, since it is one of the objects of the invention to have the same substantially continuous mass of im-- pervious insulation bind the segments together and extend round about the windings to enclose them, plish this object.

Fig. 7 is a Vertical axial section through the tool 34 into which the segments are temporarily assembled in order that they may be more easily entered into the-mold. Ihe

tool consists of a cylindrical body 35 bored I at 36 and counterbored at 37 with annular grooves 38 and 39 extending around it. The

counterbored portion 37 is divided by a se-:

ries of longitudinal-cuts into prongs 4O and teach prong is further milled at its outerdiameter from the free end to groove 38 to provide an integral key 41 extending outwardly 43. Tool 34 is also shown in perspective in VVhen an armature has been wound, and has its commutator segments 30 connected to the leads 29'as shown in Fig. 6, the collar 27 is removed andthe tool 34 is placed over shaft 16 with pin 45 in keyway. 17 of the shaft.

1 The segments-30 are then laid around the tool with keys41 of the. tool extending. outwardly between the segments asiin F-ig. 10. Bythis means the segments are held spaced apart and in correct relation to' the winding slots 20 of core 18 Ring 46, Fig. 9 is now forced over-the outside of segments 30, the prongs the tools are made to accomadapted to temporarily hold each segment in herein described, apparatus having means to locateit in axialalignment with the core, a plurality of means capable of radial'movement for locating the commutator segments inproper spaced relation, and means to align said locating means in definite angular rela tion to the winding slots of said core.

4. For building armatures of the characfer herein described apparatus.comprising,

means to locate it in axial alignment withthe core, a plurality of means capable of radial movement for locating the commutator segments in proper spaced relation, means offering resilient resistance to said radial movee ment, and means to align said locating means in definite angularrelation to thewinding slots of said core.

In testimony whereof I afiix my signature.

VINCENT e. APPLE.

4O springing slightly inward to permit the ring to go over, and the structure appears as in'Fig.'10and after removal of collar 26 is; ready to have a body of insulation molded about the winding and commutator seg-' ments. v r

In my copending application Serial Number 363,702, filed May 16th, 1929, of which,

this application is a division, I show, describe and claim'ai completed armature and the method of'making it, said method including the use of the tool herein shown and described. I therefore do not herein show the completed armature, or the method of making it, or the ticular assembling tool herein shown and describedr Q Having described my invention, I claim, 1. For building armatures of the character herein described, apparatuscomprising, a

cylinder having an axially extending opening adapted to receive the armature shaft, locating means extending into said opening'adaptedtoenter thekeyway in said shaft, and locating'means-on the outside of said cylindernecessary apparatus used in making it, claims 1n this application being confined to the par- 

